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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Photoluminescent spectroscopic and kinetic studies on green-emitting CdSeS quantum dot/polymethyl methacrylate composite
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Photoluminescent spectroscopic and kinetic studies on green-emitting CdSeS quantum dot/polymethyl methacrylate composite

机译：发射绿色CdSeS量子点/聚甲基丙烯酸甲酯复合材料的光致发光光谱和动力学研究

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摘要

Highly luminescent CdSeS quantum dots have been assembled in polymethyl methacrylate transparent composite (abbreviated as QDs/PMMA) through a prepolymerization method. The spectroscopic and kinetic studies of green-emitting CdSeS QDs dispersed in PMMA matrix are investigated by use of femtosecond laser excitation compared with that suspended in toluene and close-packed coated thin film on silica substrate. Steady-state spectroscopy of QDs/PMMA is blue-shift 2 nm than that of dispersed in toluene but is red-shift about 9 nm than that of close-packed thin film. The kinetic characterization interpreting peak shift and difference between them is the change of relative intensity between band-edge and trapping state.
机译：通过预聚合方法将高发光CdSeS量子点组装在聚甲基丙烯酸甲酯透明复合材料（缩写为QDs / PMMA）中。通过飞秒激光激发，与悬浮在甲苯和密堆积在二氧化硅基质上的涂膜薄膜相比，研究了分散在PMMA基质中的绿色发射CdSeS量子点的光谱和动力学研究。 QDs / PMMA的稳态光谱比分散在甲苯中的蓝移2 nm，但比密排薄膜的红移约9 nm。解释峰移动和峰移动的区别的动力学特征是谱带边缘和捕获态之间的相对强度的变化。

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